World’s simplest solution to properly tension control bolts

TurnaSure manufactures simple washer type load cells known as a Direct Tension Indicator or a Load Indicating Washer. TurnaSure’s legacy company invented this brilliant concept of bolting technology. When this washer device is compressed while tightening a bolt or stud, the required clamp load is indicated in the fasteners and induced in the bolted joints. TurnaSure was the world’s first company to devote all its energies to developing and supplying this unique fastener. Why are properly tightened bolts often critical?

TurnaSure manufactures the world’s largest variety of Direct Tension Indicator Washers (DTIs). These are used for achieving required tension loads on bolts in countless applications. These include Structural Steel Buildings and Bridges as well as DTI Washers for Studs used in the Petro-Chemical Industry, Anchor Bolts, and SAE Cap Screws for Automotive applications. TurnaSure also supplies special Direct Tension Indicators to customer’s individual specifications in a variety of materials including Stainless Steel.

Direct Tension Indicators work by generating an axial tensile force in a bolt or stud as the DTI protrusions are compressed; except for sufficient lubrication to allow the nut of the assembly to be rotated under load, "torque" has no affect on the process. (Note: It is bolt tension, not torque that determines the clamped up strength in a joint).

Final inspection is simple quick and easy. Especially with Direct Tension Indicators (DTIs) for structural connections, a visual inspection to determine the Direct Tension Indicators (DTIs) are flat is all that is needed. For additional assurance check a few bolts with the provided feeler gauge used as a no-go inspection tool and compare the rest by eye.